Method of producing plastic rim spools



Dec. 18, 1956 1.. H. MORIN 2,774,398

METHOD OF PRODUCING PLASTIC RIM SPOOLS Filed March 5, 1951 INVENTOR LOUIS 1. MORIN ATTORNEY V 2,774,398 METHOD OF PRODUCING PLASTIC RIM SPOOLS Louis H. Morin, Bronx, N. Y., assignor to Coats & (Ilark Inc., a corporation of Delaware Application March 5, 1951, Serial No. 213,968

' 7 Claims. (31. 144-309 This invention relates to the production of spools havplastic coatings thereon and, particularly, on the rim or. flange portions of the spools to strengthen said rim or flange portions :to facilitate the formation of the thread or strand holding nickor notch therein, so as to'prevent chipping or rupture. -More particularly, the invention deals with a method, wherein a spool or pair of spool parts are partially submerged in a heated plastic in the application-of the plastic coating thereto and, wherein, the spool or spool parts can be rotated in the submerging or dipping thereof to distribute the plastic coating over pre determinedareas of the spool and, further, wherein the means'for rotating the spool can be utilized to displace excess plastic through the action of centrifugal force;

The novel'features of the invention will be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

Fig; 1 is a diagrammatic sectional v-iewillustratingone method of applying plastic coatings to end portions 'of a spool;

method of procedure.

Fig. 3 is a View similar to Figs. 1 and 2, showing another method of' procedure insimultaneously coating and joining two spool halves; and i i i i atent Fig. 2 is a view similar to Fig. 1 showing another Fig. 4 is a fragmentary end'view of aspen 'In accordance withmethods disclosed in Sr. No. 213,122, tiled February 28, 1951,, and Ser. No.- 213,123, filed February 28,11951,]now Patent No. 2,6:8 3, 572 I disclose means for injection moulding or castingthermoplastics on spool bodies for the purpose of formingnbnchippable rim orflangeportions, as well asforp'urposes f'ofotherwise modifying the 's'tructur'eof thespools. n I

" My present invention dealsfiwith what might be termed a; dipping "or submerging method, wherein agernes o'tj a spool aresubmerged inabody of plastic iirthe ape =plication1of thejiilrrr coating of the plasticthereonbr,

wherein, the major portion 'offthespool maybe rotated a plastic body' to completely coat mas er the exterior surfaces of the spool, which lat-ter method can be further ntilized'as a means for assembling two spo'ol halves. 1 .ln Fig, '1 of the drawing, Lha'v'e diagrammatically indicatedat 10 a Vat, tank, trough or thelike, in which plastic or similar coating fluid 11 is adapted to be arranged, this 3 material being maintained in fluid or substantially fluid state through heating means or throughtsolventsji'n any desired manner was to facilitate quick drying of the film coating applied .toa spool 12, or common end portions 13, 14 thereon. The. end portions 13, 14 of the spool in the construction shown include extending annular rings v or flanges 15, 16,.respectively, and these are cut-back sufficiently 'to receive thin .film coatings; 17 ';ai'ld -.=18 in such manner that'th'ese coatings will-lie flush with the outer 2,774,398 Patented Dec. 18, 1956 "ice 7 2 surface 19 of the spool, as indicated at 20. The bore 21 of the spool is also preferably recessed at its ends, as indicated at 22, so that the portions 23 and 24 of the coatings 17 and 18, which extend into the recessed portions 22 of the bore, will be flush with the bore 21 in the manner indicated.

At 25 I have indicated in dot and dash lines part of a spindle or mandrel, on which the spool 12 can be frictionally supported in the operation of moving the spool into the tank or the like 10, to such position to submerge an end of the spool .up to the positions 20, 22 in applying the coatings 17 and 18 thereto, it being understood that these coatings are independently applied by dipping the opposed ends of the spool into the coating material 11. Withthe structure shown in Fig. 1, the operation may simply be a dipping operation and, in other instances, it may be desirable'to rotate the spindle or mandrel 25 and, with some types of film-forming materials, it will be desirable' to rotate the spool after the film coating has been applied thereto and, when the spool is arranged above the surface of the fluid 11, so as to displace excess fluid by the action of centrifugal force.

At this time, it might also be brought out that, in the different methods, as herein later disclosed, a multiple dipping or submerging operation may be performed to control'the' thickness of the film'deposit on the spoolbody. InFig. 2 of the drawing, I have diagrammatically illustrated'a method, generally similar to that illustrated in Fig. 1,in which' ltlrepresents the container for the fluid film forming material 11? and at 25is shown a spool body mountedon a spindle or mandrel 25"which is angularly disposed with respect to the container 10', for purposes later described. V The spool body 26 has end portions 27, 28 provided with circumferential flanges or rims 29 and 39. These rims are formed to receive the film coatings andjthe cylindrical bodyof the spool, where it joins the flanged ends, is notched, as'seen at 31, so that no ridge ofpro- 'j'e'ction prevails on the-surface 32 of the spool body, 7 1 In Fig. 2, the out r surfaces of the ends 27, 28 of the spool ar'e 're'ce'ssed, asseen at 33 and 34, soas to maintain the filni coatings; one of whichis seen at 35; flush with the ends ,36, 37: of the spool body. In Fig. 2,}.thebore 38-foftheis'poolbody is continuous, in other words, jdoe's movei'excessfcoatingmaterial. Ii e v 'In1Fig.:3 of the drawing, 1 have shown-aiibthe'r method of procedure aHd lfifthiS figure, 10' illustrates a tank or receptacle, in which coating material 11"is arranged and, at' ;25"; is shown a spindleorlmandrelflon which two similar spool halves 39, .39';: arefrictionally sup ported.- .JAS ;fl1CS spool'halves are of identical construction the brief, description ofione will apply tog-both. Eachls pool .half comprises an outer 'flangedfor rim and 40 offthegneral contour usually provided on s pools of the kindund'erconsideration and the inner adjacent ends ofthe'spool halves have abutting surfaces, as-at 41, outwardly of which are recessed surfaces 42, which. open through the periphery ,of the body portion 43 oflth e spool. The body portion 43'has cominon ,bores 44.i j Ii1f applyin the spool halves to he spindle or andrelfzs'ffg'they lialye's haye been mounted and fr'ictionally; or "otherwise m t nee fla e pnpna ig talh ni will be appreciated; the 'i l'asti'c s V, 7 29 7 3 8 7 4 afe frictioiially held thereomso as to maintain thespool' coatifigmaterials can be utilized to require spec al tenthalves 39, 39" in abutting engagement at and one pe'fatu'ie tifeatment forrcoo lmg or settlng and, such spool half39' is preferably iii-ranged in abutti 'instances, the spindles of mandrels can be utllized con eii I a slev 5 V at Eein veyin'g or passing the coated bodies throughttreatment' 5 stages for the quick setting ,or hadening of the coating material employed. U v V v h Having fully described my invention, Whatl claim-as new and esirle' qsecu e Winte s,Pe PP S?,, v. t l The herein described niethodof for A) subpor'td on the "spinal? 25" he:s'pindleis lowered 10 ivhich consists in r ounting a spopl bgdyon a mandrel to 's ub r ne're. the 'spdoLhafles 'inj'th o tin m te i l disposed at an acute angle to the surface 'of a settable 11" ml the "e'xtl': t dia grannnaticallyillustfatedin Fig. 3 r t gw uild; ubmerg ga11an .n ,9 ;fhrspgpl y :1 i i i i I in the coating fluid toan extentsub ergmg one corner portion only of a flair'g' 'e' end; rotatingithe mandrel and V '15- $9601 body, thus submerged, to apply a' ring-like de- With die rne' thdd as disclosed in Fig. aii d1 the isur'fa cesof the ends of the spool body. fHre again, 7 P m l'a-h di i iQk jilili'said the oated product is raised with respeeemme tamer h 59 n .d.s;" b d-j e h nf. immune I P receptacle 10" and rotated for rem al of excess coat- 25 w l m n s r q mm wo spool y Parts i am! ing'mat'eriaL s a r9 ab i p h iitqrp du i e P d' P- i i In the present illustrations, 1' have diagrammatically t i pa avm 'a qe P t j tle nfl mz 99 referred to'thehandling of individual spools on indi idual 2 5 Spool 0F131 3 andrel; IQ Y'L y spindles. It will be 'apparent,,however, that ina pro; ducgiye ense,. an apparatus can.'befeniployed utilizing severalspindles, wherein the process may be more/o1" 7 less continuoiis'glhat is to say, whereinispool blanks will 1 be attached to one spindle,.while another sbifidleisid thejrbcess of applying? coatings w, the bodies andlstill anothefspihdlemaybe passing through an ejector stage t l 7 Whi e my v n om e s r m i fw t th n i 't1' pif plastic coatings to sp oblibQdies fbr thepurggses he n stat'edgi itswill be understood that t nethod here; in i sclo'sedal'so'includes the step of preliminarily fp1';n+" iii'gajflan'ged spool having a;turned}dplvy n-pqrt ijon i 1 one or both flanged: ends, .such as Tthe' spool 26 of figg Zf-haying the fe ces'ses or-turnedporn 33" and I mek. a

5 7 @Plii 11 01 5; W ile-with .wozdt .sppbls, a fabri fcatingstep 'n ayj'be-necessary. {The m'ethdd also includes permits the 'niclking step 02 be; aegioihplished fi'yithout danger; pfi'ehippingi'the sfiofoLfiangfaiid gth nickf e prbduceiissndt 'subject 'toichipping itasua'fe' i'icli si' of .7

I conyentional'snobls;

, 5 eiicess fluid plastic from said end, setting the plastic coating to form a solid plastic rim on said end, and nicking said flanged end of the spool by cutting through the solid plastic rim thereon to form a thread holding nick.

6. The herein described method of forming spools which comprises forming two spool parts adapted to abut each other to produce a spool, mounting said spool on a mandrel, moving the mandrel so as to submerge a portion of the spool in a fluid plastic material, rotating the mandrel and spool to apply a film coating of the plastic material to the submerged portions of each said part of the spool, then moving the mandrel and spool to position the spool above the level of plastic material while continuing to rotate said spool to remove excess plastic material and leave a deposit of the plastic material on the surfaces of the spool initially submerged, and utilizing the said deposit to unite the separate parts of said spool.

7. The method of uniting two members which consists in forming a recess between abutting surfaces of said members, mounting said members on a mandrel in abutting engagement with each other, sumberging portions of said members in a fluid plastic material, rotating the mandrel and members to coat the submerged surfaces of the members and to fill said recess with said plastic material, setting the plastic material on the members, and thereby joining said members together by means of said coating and said plastic-filled recess.

References Cited in the file of this patent UNITED STATES PATENTS 797,702 Nutting Aug. 22, 1905 1,999,259 Rozema Apr. 30, 1935 2,273,250 Charlton Feb. 17, 1942 2,386,828 Wilcox Oct. 16, 1945 

